diff --git a/index.js b/index.js
index 361a873..ec03efd 100644
--- a/index.js
+++ b/index.js
@@ -237,24 +237,20 @@ export default class Flatbush {
 
                 // check if node bbox is completely inside query bbox
                 if (minX <= nodeMinX && minY <= nodeMinY && maxX >= nodeMaxX && maxY >= nodeMaxY) {
-                    let pos_start = pos;
-                    let pos_end = pos;
+                    let posStart = pos;
+                    let posEnd = pos;
 
                     // depth search while not leaf
-                    while (pos_start >= this.numItems * 4) {
-                        pos_start = this._indices[pos_start >> 2] | 0;
-                        const pos_end_start = this._indices[pos_end >> 2] | 0;
-                        pos_end = Math.min(pos_end_start + this.nodeSize * 4, upperBound(pos_end_start, this._levelBounds))-4;
+                    while (posStart >= this.numItems * 4) {
+                        posStart = this._indices[posStart >> 2] | 0;
+                        const posEndStart = this._indices[posEnd >> 2] | 0;
+                        posEnd = Math.min(posEndStart + this.nodeSize * 4, upperBound(posEndStart, this._levelBounds)) - 4;
                     }
 
-                    for (let /** @type number */ leaf_pos = pos_start; leaf_pos <= pos_end; leaf_pos += 4) {
-                        const nodeMinX = this._boxes[leaf_pos + 0];
-                        const nodeMinY = this._boxes[leaf_pos + 1];
-                        const nodeMaxX = this._boxes[leaf_pos + 2];
-                        const nodeMaxY = this._boxes[leaf_pos + 3];
-                        const leaf_index = this._indices[leaf_pos >> 2];
-                        if (filterFn === undefined || filterFn(leaf_index)) {
-                            results.push(leaf_index); // leaf item
+                    for (let /** @type number */ leafPos = posStart; leafPos <= posEnd; leafPos += 4) {
+                        const leafIndex = this._indices[leafPos >> 2];
+                        if (filterFn === undefined || filterFn(leafIndex)) {
+                            results.push(leafIndex); // leaf item
                         }
                     }
                     continue;